Contour cutting attachment for turning lathes



Aug- 10, 194 c. F. MALZAHN CONTOUR CUTTING ATTACHMENT FOR TURNING LATHESFiled April 11, 1942 IN V EN TOR.

. M. m? m 1 1. m N 1% x? m 1 N\. O p m? R, m w s 1 \T 3; N 3& mm wATTORNEYS bolts 32.

Patented Aug. 10,1943

2,326,240 i I oon'rooa CUTTING Atr'raonnmri'r role 4 1 TURNING LA'rrrEsCharles F. Mal zahn, Perry,-Okla. mm espm 11', was e-e rqei ssgett lClaim. "(o1.s 2 -14 )u 7 My invention relates to the contouringjofbodies having curved facesg and has among its objects and advantagesthe" provision .ofan improved contour attachment for turninglathesff jIn the accompanying drawing: I

V 'Figure 1' is a top planview of aconventional turning latheillustrating my invention applied :thereto; and V I sectional View takenalong the V In the embodiment selected for illustration, I make use of aconventional turning lathe I Figure 2 is a line 22 of Figured. r V

treasures having a bed i 2 on which the usual carriage I4 is adapted totravel longitudinally of the .bed.

' Figure 1 illustrates a projectile body 'lfi having one end supportedin the chuck i8 and its other end supported .by'the usual tailstockcenter 20. I also make use oflthe usual cross slide 22which carries thetool holder 2l forpresenting thetoo l 26 to the body It for shaping theface s28 o f the body to its finished contour.

Tothe cross slide-22 is secured an arm "38 {by Motion is imparted to thecross sli'de 23 7 through the medium of the arm 3?) by reaso'n'of acontour slide or bar 34 bolted, to the bar 360i the usual taper barmount. Bar 35'is supported by brackets clamped to the bed 12 in theusual j manner; In the instantcase, the contour slide 5 34 is socontoured as to 'move thefcross slide 22 transversely of the bed l2through longitudinal movement of the carriage l4 onthe bed for, movingthe tool 26in a cutting-pathconforming to, the contour of the slide; 34.The slide 34 is contoured in conformity with the contour desired ,on thebody I6. 7 r r Figure 2 illustrates a block 40 mg under- 7 i n'eath thearm 30 and provided ane pin 42 threadedly secured therein. The sleeve44" is provided with a shoulder 48 engaging the bottom 7' I 40 A key 50isv formed on the shoulder 48 and extends into the slot 46 to restrainthe sleeve from rotation. To the sleeve face of the arm 33.

44 is threadedly connected a handle 'EZQWhich acts as a nut through itsengagement with the arm 30 to fixedly secure the sleeve 44 in differentpositions longitudinally of the armr30.-

threaded onv said sleeveengagingi'the opposite j adjustment or thecontour bar 34 rnafylbe made slots 84 for the reception otfasteningbolts '66 .passing'through the 1brackets3%. 7

I a 'Tn operatiomtheimovement ofethe toolztico n forms tothe'prede'termined contourfof theslide 34 so as 'toj ac'curately shapethe facer281tothe guidedoller's 54 -is;fixedly secured' against accidentalfdisplacement with respect to thearm 30 vby reason :of'theshoulder43 and the nut handle j 52 which firmly securejithej sleeve 44to the arm 'conformity with variable shapes desired. inf the l j ofroller bearings st. irrhe bolts .52 pass through' lv' openings inrtheblock! and are 'madesecurje by nuts 52; Since the pin 42 isilooselyrelated; to v the V sleevei l l, the-block 49 -v/hich1carries the aguiderollers 54 may rotate about the axi's ot the pin to accommodate therollers 54 to the change m angleof the contourgbar 3 Accurate;

through'adjustm'ent oifthe b31136 onthe'bracketsii', 38. For thispurpose, the bar 35 isp'rovided with Slog-s Fl' Teaded intqfthefdesifed'cofitour" The 10170915549 which-.c rries the but ijs fre'e torotate in thefsleeve 44;" vvillthus v be: seen thatl- I have provided acontour'attach- V lme'nt which jmay be associated with a convene on-a1turning lathe to shape bodies to" desired I contoursp A'series/"ofslidesg34; is provided in 1 Without further elaboration, thejoregoinglwill so fully illustrate my'i'invention,that'others may, 7 byapplying'current knowledge, readily adaptfthe L r same for use undervarious conditionsof-se'rvice.. "Iclaim: I

In a turning lathe havinga bed, acarriage mov able longitudinally of thebed and a tool carrying cross slide on the carriage; the,combination'ofj contour slide fixedly related'to the lathe, an arma e Vsecured to said cross slide and havingaslot; a

sleeve extendingjthrough said slot andhaving a Y e v shoulderengagingone side of the arm,: a nut; I

side of said 'arm to secure the sleeve-against I 7 Guide rollers54frespectively engage the guid faces 58 on the contour bar 34, whichguide roll-1' e'rs are mounted on bolts 58 through the medium.

accidentalmovement on the arm, a body having a pinrotatably supportedingsaidsleeve and guide rollers o-n ssaidbo'dy engaging said contourslide to move the arm and shift the tool in a Path conforming to thecontour of said contour slide.-f;

r 1 7 CHARLES F. l

